Re-creating the "Suppressible" concern that was shown in this screencast from DHH: https://www.youtube.com/watch?v=m1jOWu7woKM

suppressible.rb

module Suppressible
  extend ActiveSupport::Concern

  class_methods do
    def suppress
      self.suppressed = true
      yield
    ensure
      self.suppressed = false
    end

    def suppressed?
      suppressed == true
    end

    private

    attr_accessor :suppressed
  end
end

This is my best attempt so far; the actual concern wasn't shown in the screencast but I'm really interested in using a similar approach. Let me know if you see ways to improve on this!

In the screencast, DHH showed using it in the following way. Let's say I've included this concern in a Mention class:

Mention.suppressed?
=> false

Mention.suppress do
  Mention.suppressed?
end
=> true

The specific use case is so that you can suppress active record callback for times when you DON'T want the side effect to happen.

One thing I'm curious about here is that this assumes we'd want to suppress all callbacks. Maybe we could do something like pass an optional argument to self.suppressed that would allow us to specify particular callbacks we didn't want to run. But, that would be vulnerable to changes in the method name

Hmm, maybe the answer there is unless hooks on the specific callbacks